There's a self published sci fi writter that I can't get enough off.
There are two series that I'm following.
Warrior's Wings (book 1)
http://www.amazon.com/Silver-Wings-W...9861917&sr=1-9
Odyssey One (book 1)
http://www.amazon.com/Into-Black-Ody...9861917&sr=1-7
I follow him on Google+ and I believe that he said Warrior's Wings will be at least a 15 book story arc. He's only done 4 so far.